Yoweri Museveni, the Ugandan president who was among the first leaders to recognise Kibaki's legitimacy after the contested poll, met Kibaki on Wednesday.

Several international attempts to bring the two sides into face-to-face talks have so far failed.

Riot police and protesters on Wednesday fought running battles at a funeral procession held by the opposition for Nairobi slum residents killed in violence over the country's disputed election.

Odinga, leader of the Orange Democratic Movement (ODM), fled the scene after the latest clashes in Nairobi, the Kenyan capital.

He said in a statement: "This government first committed the unforgivable crime ofstealing the vote, it then kills those who protest, and finally, when people come to mourn the departed, it assaults them as well.

"This latest attack on a peaceful gathering shows that this government is running amok ... To assault peacefully gatheredmourners is a terrible crime, made much worse when the peoples'leaders, including the winner of the presidential election, are thetargets."

Tribal clashes

At least 12 people were killed in Kenya overnight amid fighting between rival tribes and gangs, police said on Thursday.